<p>I’m suspicious whether those collegeboard dudes made questions in AP level.
And i chose the mutation answer for that asexual reproduction question too</p>
<p>I’m gonna sleep (I live in Korea…different time zone)
Everyone please keep this thread active.</p>
<p>The questions here do seem a bit harder than the ones I had on my test January last year (even factoring in many things I knew but forgot). Still, I don’t think they’re truly AP level though–you have to take a look at Campbell’s to really get a taste of what it’s like. (9 stages (is it?) of glycolysis, anyone?)</p>
<p>I don’t claim that the picture is accurate, but the thorax does seem the best place for an insect’s legs to be (smack dab in the middle). However, many of the other organs do seem to be in the back, so that’s good for you guys.</p>
<p>As for the question involving ecosystems, I would have to see all the answer choices to make a decision. However, from the two answers I’m seeing, I’m divided. Certainly decomposers are essential to any ecosystem that has them in order to recycle nutrients, but the keyword is “all ecosystems.” It is also true that consumers lose energy as heat from lower levels on the food chain in all ecosystems that have consumers and producers.</p>
<p>In the end, I feel this hinges on one’s definition of ecosystem, which is very loosely defined. Then again, I’m no expert, so take anything I say with a grain of salt.</p>
<p>I do not know what information was provided for the bristlecone question, but your answer, Ryan, is logical. If both were growing at all elevations, then elevation and any climate difference resulting from that should not be a factor. Different slopes could definitely have different soil types with different nutrients and different abilities to hold water.</p>
<p>Switching to the asexual reproduction question, I don’t know what the other choices were, so I can’t give you a definite answer. All I know is that asexual reproduction is usually advantageous because it is fast. Any mutations in the original, however, should still be present, and in fact, have a higher chance of being present, in the offspring because they are exact clones of the original.</p>
<p>yesssssssssssssssssssssssssssss. thank you tedjin…i was so depressed at first.</p>
<p>The one about the plasmid and whether or not the plasmid was passed to daughter cells depended if it had a centromere? Why was the centromere needed?</p>
<p>I put the centromere helped contribute to the mitotic spindle… the rest of the answers didn’t seem as appealing… what do you guyz think?</p>
<p>I chose the one “Cytokinesis will not occur unless the plasmid is moved to the end of the pole” this choice</p>
<p>What do you think a raw score of 66 will be on this test… the range…?</p>
<p>I’d like a 750 on this one… I’d make me happy…</p>
<p>I do not know the exact curve, but I have heard on normal biology tests, the 800 curve is one to two questions. I don’t know about 750, however. You can use the percentile’s from previous years to guesstimate the curve however:</p>
<p><a href=“College Board - SAT, AP, College Search and Admission Tools”>College Board - SAT, AP, College Search and Admission Tools;
<p>Back to the question about the plasmid. I must say I have almost completely forgotten my knowledge of mitosis. What was the question asking for?</p>
<p>It talked about a plasmid that entered a cell. The cell only passed the plasmid on to its daughter cells if the plasmid had a centromere at the time of replication. Why was the centromere needed for replication?</p>
<p>I can’t recall other answers, but I put that that it was because “The centromere allowed the mitotic spindle to form.” – which sounds bad but the other ones didn’t seem that appealing to me.</p>
<p>There are a lot of things that need to be inferred in this question if you did not study this exactly. For instance, the Wikipedia page on plasmid says that plasmids are auto-replicating, which contradicts the question, although I don’t know the validity of that either.</p>
<p>From what the question asks, however, it’s logical to conclude that the centromeres allow the mitotic spindle to connect to the plasmid and sweep it along in further stages of mitosis.</p>
<p>Again, I emphasize that I’m definitely not the most knowledgeable, but this is how I’d think ;)</p>
<p>Thanks for all your help, and that’s how I reasoned the question as well… but I can’t recall the rest of the qustion and/or the answers… I guess I’ll have to wait on this one.</p>
<p>No problem, we’re supposed to keep the thread alive in any case :)</p>
<p>“an evolutionary standpoint, one could thus argue that asexual reproduction is inferior because it stifles the potential for change. However, there is also a significantly reduced chance of mutation or other complications that can result from the mixing of genes.” – Wikipedia</p>
<p>So I’m guessing the asexual benefit I was talking about earlier can be assumed to be a lessened chance of mutations – or at least, I hope so.</p>
<p>Did anyone think this test was hard… I’m really hoping the curve won’t suck. Like -2 = 790 already.</p>
<p>I’ve taken it twice before and I say this was the hardest one.</p>
<p>If the other answer choices did not appeal, then trust your gut. Asexual reproduction does lessen the chance of mutation just as it lessens chance for improvement. Did the answer choice specifically talk about passing mutations, though?</p>
<p>By the way, I hope I don’t say anything that anyone doesn’t want to hear. Now that I’m home, I have the advantage of unlimited time and the infinite power of Google at my fingertips. If I took the test, I’d be in the same boat as you guys.</p>
<p>No, you’ve only been helpful… thanks a lot.</p>
<p>Oh and question… for the C6H1206 one, isn’t the answer: where the elements are placed cannot be determined or something like that. </p>
<p>Because glucose and fructose and galactose all have the same chemical formula… but different structure? It has nothing to do with isotopes or whatever was said before.</p>
<p>No, it does not have to do with isotopes, although the formula does not give any hints about what isotope the individual atoms are. The correct term is isomer–I do not know if it was mentioned earlier in this thread. Yes, the molecular formula does not give any clues about its molecular structure.</p>